/*

 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

/*

 * DSA low level APIs are deprecated for public use, but still ok for

 * internal use.

 */

#include "internal/deprecated.h"

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/bio.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

#include <openssl/pkcs7.h>

#include <openssl/pem.h>

#include <openssl/rsa.h>

#include <openssl/dsa.h>

#include <openssl/dh.h>

#include "pem_local.h"

static RSA *pkey_get_rsa(EVP_PKEY *key, RSA **rsa);

#ifndef OPENSSL_NO_DSA

static DSA *pkey_get_dsa(EVP_PKEY *key, DSA **dsa);

#endif

#ifndef OPENSSL_NO_EC

static EC_KEY *pkey_get_eckey(EVP_PKEY *key, EC_KEY **eckey);

#endif

IMPLEMENT_PEM_rw(X509_REQ, X509_REQ, PEM_STRING_X509_REQ, X509_REQ)

IMPLEMENT_PEM_write(X509_REQ_NEW, X509_REQ, PEM_STRING_X509_REQ_OLD, X509_REQ)

IMPLEMENT_PEM_rw(X509_CRL, X509_CRL, PEM_STRING_X509_CRL, X509_CRL)

IMPLEMENT_PEM_rw(X509_PUBKEY, X509_PUBKEY, PEM_STRING_PUBLIC, X509_PUBKEY)

IMPLEMENT_PEM_rw(PKCS7, PKCS7, PEM_STRING_PKCS7, PKCS7)

IMPLEMENT_PEM_rw(NETSCAPE_CERT_SEQUENCE, NETSCAPE_CERT_SEQUENCE,

                 PEM_STRING_X509, NETSCAPE_CERT_SEQUENCE)

#ifndef OPENSSL_NO_DEPRECATED_3_0

/*

 * We treat RSA or DSA private keys as a special case. For private keys we

 * read in an EVP_PKEY structure with PEM_read_bio_PrivateKey() and extract

 * the relevant private key: this means can handle "traditional" and PKCS#8

 * formats transparently.

 */

static RSA *pkey_get_rsa(EVP_PKEY *key, RSA **rsa)

{

    RSA *rtmp;

    if (!key)

        return NULL;

    rtmp = EVP_PKEY_get1_RSA(key);

    EVP_PKEY_free(key);

    if (!rtmp)

        return NULL;

    if (rsa) {

        RSA_free(*rsa);

        *rsa = rtmp;

    }

    return rtmp;

}

RSA *PEM_read_bio_RSAPrivateKey(BIO *bp, RSA **rsa, pem_password_cb *cb,

                                void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);

    return pkey_get_rsa(pktmp, rsa);

}

# ifndef OPENSSL_NO_STDIO

RSA *PEM_read_RSAPrivateKey(FILE *fp, RSA **rsa, pem_password_cb *cb, void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);

    return pkey_get_rsa(pktmp, rsa);

}

# endif

IMPLEMENT_PEM_write_cb(RSAPrivateKey, RSA, PEM_STRING_RSA, RSAPrivateKey)

IMPLEMENT_PEM_rw(RSAPublicKey, RSA, PEM_STRING_RSA_PUBLIC, RSAPublicKey)

IMPLEMENT_PEM_rw(RSA_PUBKEY, RSA, PEM_STRING_PUBLIC, RSA_PUBKEY)

#endif

#ifndef OPENSSL_NO_DSA

static DSA *pkey_get_dsa(EVP_PKEY *key, DSA **dsa)

{

    DSA *dtmp;

    if (!key)

        return NULL;

    dtmp = EVP_PKEY_get1_DSA(key);

    EVP_PKEY_free(key);

    if (!dtmp)

        return NULL;

    if (dsa) {

        DSA_free(*dsa);

        *dsa = dtmp;

    }

    return dtmp;

}

DSA *PEM_read_bio_DSAPrivateKey(BIO *bp, DSA **dsa, pem_password_cb *cb,

                                void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);

    return pkey_get_dsa(pktmp, dsa); /* will free pktmp */

}

IMPLEMENT_PEM_write_cb(DSAPrivateKey, DSA, PEM_STRING_DSA, DSAPrivateKey)

IMPLEMENT_PEM_rw(DSA_PUBKEY, DSA, PEM_STRING_PUBLIC, DSA_PUBKEY)

# ifndef OPENSSL_NO_STDIO

DSA *PEM_read_DSAPrivateKey(FILE *fp, DSA **dsa, pem_password_cb *cb, void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);

    return pkey_get_dsa(pktmp, dsa); /* will free pktmp */

}

# endif

IMPLEMENT_PEM_rw(DSAparams, DSA, PEM_STRING_DSAPARAMS, DSAparams)

#endif

#ifndef OPENSSL_NO_DEPRECATED_3_0

# ifndef OPENSSL_NO_EC

static EC_KEY *pkey_get_eckey(EVP_PKEY *key, EC_KEY **eckey)

{

    EC_KEY *dtmp;

    if (!key)

        return NULL;

    dtmp = EVP_PKEY_get1_EC_KEY(key);

    EVP_PKEY_free(key);

    if (!dtmp)

        return NULL;

    if (eckey) {

        EC_KEY_free(*eckey);

        *eckey = dtmp;

    }

    return dtmp;

}

EC_KEY *PEM_read_bio_ECPrivateKey(BIO *bp, EC_KEY **key, pem_password_cb *cb,

                                  void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);

    return pkey_get_eckey(pktmp, key); /* will free pktmp */

}

IMPLEMENT_PEM_rw(ECPKParameters, EC_GROUP, PEM_STRING_ECPARAMETERS,

                 ECPKParameters)

IMPLEMENT_PEM_write_cb(ECPrivateKey, EC_KEY, PEM_STRING_ECPRIVATEKEY,

                       ECPrivateKey)

IMPLEMENT_PEM_rw(EC_PUBKEY, EC_KEY, PEM_STRING_PUBLIC, EC_PUBKEY)

#  ifndef OPENSSL_NO_STDIO

EC_KEY *PEM_read_ECPrivateKey(FILE *fp, EC_KEY **eckey, pem_password_cb *cb,

                              void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);

    return pkey_get_eckey(pktmp, eckey); /* will free pktmp */

}

#  endif

# endif /* !OPENSSL_NO_EC */

#endif /* !OPENSSL_NO_DEPRECATED_3_0 */

#ifndef OPENSSL_NO_DH

IMPLEMENT_PEM_write(DHparams, DH, PEM_STRING_DHPARAMS, DHparams)

IMPLEMENT_PEM_write(DHxparams, DH, PEM_STRING_DHXPARAMS, DHxparams)

/* Transparently read in PKCS#3 or X9.42 DH parameters */

DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)

{

    char *nm = NULL;

    const unsigned char *p = NULL;

    unsigned char *data = NULL;

    long len;

    DH *ret = NULL;

    if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))

        return NULL;

    p = data;

    if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0)

        ret = d2i_DHxparams(x, &p, len);

    else

        ret = d2i_DHparams(x, &p, len);

    if (ret == NULL)

        ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB);

    OPENSSL_free(nm);

    OPENSSL_free(data);

    return ret;

}

# ifndef OPENSSL_NO_STDIO

DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)

{

    BIO *b;

    DH *ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {

        ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);

        return 0;

    }

    BIO_set_fp(b, fp, BIO_NOCLOSE);

    ret = PEM_read_bio_DHparams(b, x, cb, u);

    BIO_free(b);

    return ret;

}

# endif

#endif

IMPLEMENT_PEM_provided_write(PUBKEY, EVP_PKEY, pkey, PEM_STRING_PUBLIC, PUBKEY)